Novadays lead telluride and solid solutions based on it are among the best narrow-band semiconductor thermoelectric materials [1, 6]. From the literature it is known that Sb impurities in different effects on the energy spectrum of electrons in PbTe, leading to changes in certain physical properties, including thermoelectric. Antimony is a donor impurity, which allows to control the concentration of electrons in crystals. Antimony gives crystals of lead telluride extremely low lattice conductivity. This fact raises interest to lead telluride as a promising material for thermoelectric power converters due to the effective increase of the value of thermoelectric good quality [2-4]. Lead telluride synthesized by fusion in evacuated quartz ampoules from mixing the components at temperatures to 1240 K. Outgoing chemical elements was 99,99% purity, taken in stoichiometric ratio of weight to 15 g, and Sb in amount 0,1, 0,3 and 1% by weight of Pb. Type conductivity compounds alter deviation from stoichiometry - for n-type conduction in the ampoule loaded surplus (10%) Pb, and p-type - same excess of Te. Temperature conditions of synthesis assessed by calculation of the values of the constants of chemical equilibrium by the chemical thermodynamics methods and refined to fit the geometry and quartz ampoules [5]. The research of the coefficient of thermoemf of samples confirms its change with increasing concentration of impurities Sb. For sample PbTe coefficient of thermoemf is 222 μV/К, for samples PbTe+0,1% Sb – 133 μV/К, PbTe+0,3% Sb – 111 μV/К, PbTe+1% Sb – 66 μV/К. From the material of n-and p-type was made thermoelement. The coefficient of this thermoelectric element is 530 μV/K.